Smart Helmet by abot

Alt + Z (by default, you can chnage it) will swap helmet On/Off
Alt + Drag + Equip/ Alt + Drag + Unequip will store/erase preference for that helmet
You can set the mod to automatically swap helmet on cellchange depending on:
- number/distance/fight of hostiles around
- current weather
- allow/disallow automatic unequipping of enchanted helmet
- current light condition (if player has some helmet enchanted with light/nighteye constant effect)